The way I look at it is that quality games sells systems. Persona 4 did exactly what was expected of it, massive hardware boost for the PlayStation Vita and it sold over 120k first week. Which that alone has placed the game in a very exclusive club on the system.
Persona 4 could actually be the first Vita game to still be in the top 10 the week after release. Atlus should be very proud of what they did and should help in them bringing more content to the Vita.
Lets not forget the Crystal White Vita and Special Edition Hatsune Miku Vita bundle (special Vita hardware as well).







